Tonight I got enough time to take a look at the yamaha champ that I bought a week ago. I bought it for $40... and its really a piece of junk.
I just want to be able to cruise around my campus and piss off the public saftey officers :)
The big thing that I had to do was get spark. I took a quick look at the points and they opened and closed fine. The guy I bought it from said he thought it needed a new coil or something. Well the coil wasn't plugged in, and neither were any of the other wires. I junction box had seperated and there were tons of loose wires.
I connected all the wires as best I could by matching colors and then rolled down the hill. I had a very big spark. If I couldn't get a spark I was going to sell the bike because the only place to get the wiring schematic is at a yamaha dealer with the $80 service manual.
So I dripped a little gas into the head and it fired up. It has 100lbs compression so it should run, but maybe not great.
The carb was clogged and I didn't really feel like cleaning it tonight, but maybe tomorrow. The fuel leaks out of the fuel inlet to the carb. I will have to try and get a new one from a dealer.
I think the bike is a 80cc, but I'm really not sure, I plan on measuring the piston and the stroke tomorrow.
I may get a new piston and rings for it if I can find them. Does anyone know a good mail order yamaha dealer?
Or does anyone have any parts for it?
Also if I got a new piston, do I need to get an oversize, or will the standard be fine. I have no idea how many miles are on this but I'm guessing 4-7000mi.
I'll take some pictures when I work on it some more.